Improvement in non-freezing batteries



UNITED STATES i PATENT OFFICE.

EDWARD- H. AsHoRoET, 0E BOSTON, MASSACHUSETTS.

IMPRVEMENT IN NON FREEZING BATTERIES).

Specification forming part of Letters Patent No. 1115. l 43, dated Decimber 2, 1873; application iled October 30, 1673.

yTo all whom it may concern:

Be it known that I, EDWARD H. AsHoRoET, of Boston, in the county of Suolk and State of Massachusetts, have invented certain new and useful Improvements in Railroad Signal- Boxes; and I do hereby declare the following and claimed.

Heretofore great difficulty has been expe- -rienced on account of the freezing of the electrical batteries, and I propose to obviate this diiculty as follows: I make a Water-tight cellar or caisson, A, and into this caisson I place the box B, containing the cell C of the battery.

The caisson A is so deep that it securely houses the battery C. The box B, containing the battery, may exactly fit the caisson, or an airspace may be left between the box and the Wall of the caisson; and the batterybox may be at the base of the signal, or it may be separated from it and stand in another locality. In thel bottom of the cell-chamber I place a lamp, D, and keep it burning during the winter, and an air tube, E, furnishes air to the lamp D, while an other tube, F, serves as avent for the foul gases; and the exterior ends of. these pipes are covered, so as to prevent rain or snow from passing into them.

Instead of employing a separate box, the

caisson itself may be employed, and, Whether the caisson or the box be employed, a cover, G, should cover the top of the box or caisson, the vsaid cover inclosing also anV air-space, if desirable.

What I claim as new, and desire to secure by Letters Patent, is

The outdoor battery composed of cells, C, inclosed in a subterranean close chamber, and

fresh air, and vent F for escape of the batteryfumes and products of combustion.

In testimony that I claim the foregoing I have hereunto set my hand this 29th day of October, 1873.

EDWARD H. ASHGROFT. Witnesses:

AGLAND BoYLE, LEVERETT L. LEGGETT.

provided with lamp D, pipe E for supplying A 

